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Btec Applied Science Unit 3 Exam
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Btec Applied Science Unit 3 Exam 2024-2025What is a Hypothesis? - An Idea that you can test using practical experiments
What are the Key features of a good hypothesis? - A good Hypothesis must:
Be able to be tested scientifically
Relate one dependent variable to on independent variable
What is Null Hypothesis? - States that there is no relationship or causality for example,
no relation between the temperature and the rate of reaction.
What does qualitative data refer to? - Answer It is an observation of the appearance or
value of something, for example colour observed or whether the bubbles are produced.
What does Quantitative data refers to? - Answer It is the measurement made in
numerical values, for instance the volumes and times measured.
What is SOP? - Answer The Standard Operating Procedure. This is an established
procedure or method used for the performance of a routine activity. It ensures
consistent results every time.
What are some examples of SOPs? - Answer Titration, Handling of chemicals, disposal
of waste, qualitative analytical tests, preparing solutions
What are risk assessments? - Answer It identifies hazards, evaluates the risks
associated with those hazards and it determines ways to eliminate or control those
risks.
What is a Hazard? - Answer When the equipment or substance can cause harm, for
, example a hot plate or hydrochloric acid
What is a risk? - Answer The harm that the hazard could cause and the chances of it
happening, for example the risk of using a hot plate is getting burnt.
What is the independent variable? - Answer The variables you change during an
investigation.
What is the Dependent variable? - Answer The variables you are investigating and
measure during an investigation.
What is the control variable? - Answer The variables you keep constant during an
investigation.
What should a method be? - Answer A step-by-step set of instructions, Be logically
ordered, allows you to take sensible measurements, and allows you to test your
hypothesis.
When planning your method what do you need to make sure? - Answer That it will
procedure a range of results, reliable results, precise results, and accurate results.
What are some types of data? - Answer The data can be continuous such as the age of
plant ir number of plants. Some data can be a mixture of numbers and names such as
the number of different types of plants found in a garden.
What type of data is usually presented on a bar chart? - Answer Continuous data. You
must ensure its a smooth curve of best fit and that the curve goes through or near most
of the points.
What are bar charts used for? - Answer They are used for discrete data but can be used
to compare different sets of data.
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